12128897 has 16 divisors (see below), whose sum is σ = 14065920. Its totient is φ = 10342800.

The previous prime is 12128887. The next prime is 12128903. The reversal of 12128897 is 79882121.

It is a cyclic number.

It is not a de Polignac number, because 12128897 - 2¹⁰ = 12127873 is a prime.

It is a super-2 number, since 2×12128897² = 294220284873218, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12128897.

It is not an unprimeable number, because it can be changed into a prime (12128827) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27158 + ... + 27600.

It is an arithmetic number, because the mean of its divisors is an integer number (879120).

Almost surely, 2^12128897 is an apocalyptic number.

It is an amenable number.

12128897 is a deficient number, since it is larger than the sum of its proper divisors (1937023).

12128897 is a wasteful number, since it uses less digits than its factorization.

12128897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604.

The product of its digits is 16128, while the sum is 38.

The square root of 12128897 is about 3482.6566009298. The cubic root of 12128897 is about 229.7596544130.

The spelling of 12128897 in words is "twelve million, one hundred twenty-eight thousand, eight hundred ninety-seven".